Projek ini menggunakan arsitektur client server dan memiliki 2 macam user.
1. Navigation Drawer
https://developer.android.com/training/implementing-navigation/nav-drawer.html
http://www.techizhub.com/2017/06/navigation-drawer-android-tutorial.html
2. CardView
https://www.androidhive.info/2016/05/android-working-with-card-view-and-recycler-view/
https://www.androidtutorialpoint.com/material-design/android-cardview-tutorial/
http://www.journaldev.com/10024/android-recyclerview-android-cardview-example-tutorial
http://codesfor.in/android-listview-using-cardview-example/
3. Retrofit
https://www.androidtutorialpoint.com/networking/retrofit-android-tutorial/
http://www.vogella.com/tutorials/Retrofit/article.html
4. Fast Android Networking Library
https://github.com/amitshekhariitbhu/Fast-Android-Networking
https://github.com/amitshekhariitbhu/Fast-Android-Networking/blob/master/rxsampleapp
#JSON Object dan Array
https://www.androidhive.info/2014/09/android-json-parsing-using-volley/
{
"status": "ok",
"source": "techcrunch",
"sortBy": "top",
"articles": [
{
"author": "Ingrid Lunden, Fitz Tepper",
"title": "Confirmed: AT&T is buying Time Warner for $85.4B in cash and shares",
"description": "After days of speculation, the deal is now official: AT&T is acquiring Time Warner for $85 billion in a mix of cash and shares, paving the way for..",
"url": "http://social.techcrunch.com/2016/10/22/confirmed-att-is-buying-time-warner-for-85-4b-in-cash-and-shares/",
"urlToImage": "https://tctechcrunch2011.files.wordpress.com/2016/10/946_432_newsroom_release_tw.jpg?w=764&h=400&crop=1",
"publishedAt": "2016-10-23T00:02:34Z"
},
private void parsingJSOBObject(JSOBObject response) {
try {
// Parsing json array response
// loop through each json object
jsonResponse = "";
for (int i = 0; i < response.length(); i++) {
JSONObject person = (JSONObject) response
.get(i);
String name = person.getString("name");
String email = person.getString("email");
JSONObject phone = person
.getJSONObject("phone");
String home = phone.getString("home");
String mobile = phone.getString("mobile");
}
} catch (JSONException e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(),
"Error: " + e.getMessage(),
Toast.LENGTH_LONG).show();
}
}
{
"status": "ok",
"source": "techcrunch",
"sortBy": "top",
"articles": [
{
"author": "Ingrid Lunden, Fitz Tepper",
"title": "Confirmed: AT&T is buying Time Warner for $85.4B in cash and shares",
"description": "After days of speculation, the deal is now official: AT&T is acquiring Time Warner for $85 billion in a mix of cash and shares, paving the way for..",
"url": "http://social.techcrunch.com/2016/10/22/confirmed-att-is-buying-time-warner-for-85-4b-in-cash-and-shares/",
"urlToImage": "https://tctechcrunch2011.files.wordpress.com/2016/10/946_432_newsroom_release_tw.jpg?w=764&h=400&crop=1",
"publishedAt": "2016-10-23T00:02:34Z"
}
atau menggunakan konsep Array
private void parsingJSOBObject(JSOBObject response) {
try {
JSONArray obj = response.getJSONArray("articles");
for (int i = 0; i < obj.length(); i++) {
JSONObject jsonObject = obj.getJSONObject(i);
String author = jsonObject.getString("author");
String date = jsonObject.getString("date");
}
}
catch (JSONException e) {
e.printStackTrace();
}
}
Problem yang ketemu
https://stackoverflow.com/questions/37586800/android-gradle-duplicate-files-copied-in-apk-meta-inf-license-txt
5. Permission
https://www.androidhive.info/2016/11/android-working-marshmallow-m-runtime-permissions/
6. Cara BackPressed/Kembali dari satu fragment ke fragment sebelumnya
# MainActivity.java
@Override
public void onBackPressed() {
drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
Log.i("Jumlah stack", String.valueOf(fragmentManager.getBackStackEntryCount()));
fragmentManager = getSupportFragmentManager();
if (fragmentManager.getBackStackEntryCount() > 0) {
Log.i("MainActivity", "popping backstack");
fragmentManager.popBackStack();
} else {
Log.i("MainActivity", "nothing on backstack, calling super");
super.onBackPressed();
}
}
}
# Tampilkan Fragment 1
Fragment fragment = new MatakuliahFragment().newInstance(1);
fragmentManager.beginTransaction()
.replace(R.id.content_frame, fragment)
.addToBackStack(null)
.commit();
# Tampilkan Fragment 2
Fragment fragment = new PertemuanFragment().newInstance(1);
fragmentManager.beginTransaction()
.replace(R.id.content_frame, fragment)
.addToBackStack(null)
.commit();
7. SharePreference / Session
https://www.androidhive.info/2012/08/android-session-management-using-shared-preferences/
#Deklarasi
private SharedPreferences sharedpreferences;
private SharedPreferences.Editor editor;
#Inisiasi
Context context = view.getContext();
sharedpreferences = context.getSharedPreferences(MyPREFERENCES, Context.MODE_PRIVATE);
editor = sharedpreferences.edit();
#Simpan data
editor.putString(Nama, "Habibie, M.Kom");
editor.commit();
#Hapus data
editor.clear();
editor.commit();
#Ambil data
String nama = sharedpreferences.getString(Nama,"");
8. Upload File to Server
https://www.simplifiedcoding.net/upload-pdf-file-server-android/
http://www.coderefer.com/android-upload-file-to-server/
9. Mengubah warna floating button
app:backgroundTint=""
https://freakycoder.com/android-notes-42-how-to-change-floating-action-buttons-fab-colour-361cea7d123c
#mengganti warna dan icon
android:src="@drawable/icon" // change backgroung icon
app:backgroundTint="@color/icons" // change background color
mFloatingActionButton.setImageResource(R.drawable.icon2); //https://stackoverflow.com/a/38508618
10. Alamat IP localhost di emulator Android Studio
IP address check via ipconfig, Ethernet Local Address, contoh 192.168.59.1
https://stackoverflow.com/questions/42904584/how-to-connect-to-localhost-from-android-studio-emulator
11. Pertukaran data antar Fragment //https://stackoverflow.com/a/36041722
#in parent fragment :
SettingsBlockedUsersFragment fragment = new SettingsBlockedUsersFragment();
Bundle arguments = new Bundle();
arguments.putString( string_key , desired_string);
fragment.setArguments(arguments);
final FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.replace(R.id.content, fragment , FRAGMENT_TAG);
ft.commit();
#in child fragment :
Bundle arguments = getArguments();
String desired_string = arguments.getString(string_key);
12. Menonaktifkan otomatis focus pada TextInput //https://stackoverflow.com/a/32828632
Taruh di root view, misalkan di CoordinatLayout Activity
android:focusableInTouchMode="true"
13. Menyembunyikan Navigation menu
// https://stackoverflow.com/a/35661855
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
Menu menu =navigationView.getMenu();
MenuItem target = menu.findItem(R.id.nav_target);
target.setVisible(false);
14. Desain Material
https://material.io/color/#!/?view.left=0&view.right=0&primary.color=C2185B
https://www.uplabs.com/
https://www.materialpalette.com/blue/deep-purple
15. Mengecek suatu kata mengandung kata tertentu di PHP
https://stackoverflow.com/a/4366748
$a = 'How are you?';
if (strpos($a, 'are') !== false) {
echo 'true';
}
16. Kirim data ke activity lain dan menerimanya
First Activity
Intent intent = new Intent(this, Secondary.class);
intent.putExtra("name",value);
startActivity(intent);
In the Secondary Activity:
Bundle bundle = getIntent().getExtras();
if (bundle != null) {
bundle.getString("name");
}
17. Upload
https://www.simplifiedcoding.net/upload-pdf-file-server-android/
http://www.coderefer.com/android-upload-file-to-server/
18. Download
http://www.coderzheaven.com/2013/03/06/download-pdf-file-open-android-installed-pdf-reader/
https://www.sundoginteractive.com/blog/android-download-and-open-.pdf-from-a-secured-server
http://deepshikhapuri.blogspot.in/2017/07/open-pdf-from-url-in-android.html
19. Membuat folder di Android //https://stackoverflow.com/a/44645930
//Save Internal Storage
File myMainDir = context.getDir("MainFolder", Context.MODE_PRIVATE);
File mySubjectDir = new File(myMainDir, subFolder);
mySubjectDir.mkdir();
File myModuleDir = new File(mySubjectDir, semiSubFolder);
myModuleDir.mkdir();
File myFinalDir = new File(mySubjectDir, fileName);
//Save External Storage
String DNAME = "MainFolder"+"/"+subFolder+"/"+semiSubFolder;
File rootPath = new File(Environment.getExternalStorageDirectory().toString(), DNAME);
if(!rootPath.exists()) {
rootPath.mkdirs();
}
if(!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
Log.v("Cannot use storage","Cannot use storage");
}
File myFinalDir = new File(rootPath,TopicName);
20. Download File //https://github.com/amitshekhariitbhu/Fast-Android-Networking/blob/master/rxsampleapp/src/main/java/com/rxsampleapp/SubscriptionActivity.java
# Utils.java
public class Utils {
public static String getRootDirPath(Context context) {
if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) {
File file = ContextCompat.getExternalFilesDirs(context.getApplicationContext(), null)[0];
return file.getAbsolutePath();
} else {
return context.getApplicationContext().getFilesDir().getAbsolutePath();
}
}
public static void logError(String TAG, Throwable e) {
if (e instanceof ANError) {
ANError anError = (ANError) e;
if (anError.getErrorCode() != 0) {
// received ANError from server
// error.getErrorCode() - the ANError code from server
// error.getErrorBody() - the ANError body from server
// error.getErrorDetail() - just a ANError detail
Log.d(TAG, "onError errorCode : " + anError.getErrorCode());
Log.d(TAG, "onError errorBody : " + anError.getErrorBody());
Log.d(TAG, "onError errorDetail : " + anError.getErrorDetail());
} else {
// error.getErrorDetail() : connectionError, parseError, requestCancelledError
Log.d(TAG, "onError errorDetail : " + anError.getErrorDetail());
}
} else {
Log.d(TAG, "onError errorMessage : " + e.getMessage());
}
}
}
#Activity method
String dest_file_path = "test.pdf";
AndroidNetworking.download(URL_FILE, Utils.getRootDirPath(getApplicationContext()), dest_file_path)
.setTag("downloadTest")
.setPriority(Priority.MEDIUM)
.build()
.setDownloadProgressListener(new DownloadProgressListener() {
@Override
public void onProgress(long bytesDownloaded, long totalBytes) {
Log.d("Download", "bytesDownloaded : " + bytesDownloaded + " totalBytes : " + totalBytes);
Log.d("Download", "setDownloadProgressListener isMainThread : " + String.valueOf(Looper.myLooper() == Looper.getMainLooper()));
}
})
.startDownload(new DownloadListener() {
@Override
public void onDownloadComplete() {
Log.d("Download", "File download Completed");
File file = new File(Utils.getRootDirPath(getApplicationContext()), dest_file_path);
Uri path = Uri.fromFile(file);
try {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(path, "application/pdf");
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
} catch (ActivityNotFoundException e) {
tv_loading
.setError("PDF Reader application is not installed in your device");
}
}
@Override
public void onError(ANError error) {
}
});
21. Download Manager
https://www.androidtutorialpoint.com/networking/android-download-manager-tutorial-download-file-using-download-manager-internet/
http://blog.vogella.com/2011/06/14/android-downloadmanager-example/
https://www.codeproject.com/Articles/1112730/Android-Download-Manager-Tutorial-How-to-Download
22. Convert Uri to File //https://stackoverflow.com/a/8370299
File file = new File(filePath.getPath());
NOTE: url.toString() return a String in the format: "file:///mnt/sdcard/myPicture.jpg",
whereas url.getPath() returns a String in the format: "/mnt/sdcard/myPicture.jpg",
23. Progress Bar Horizontal // https://android--code.blogspot.com/2015/08/android-progressbar-horizontal-example.html
<ProgressBar
android:id="@+id/pb"
android:layout_width="250dp"
android:layout_height="wrap_content"
android:layout_below="@id/tv"
style="@android:style/Widget.Holo.Light.ProgressBar.Horizontal"
/>
int progressStatus = (int) longVariable;
pb.setProgress(progressStatus);
24. Membuat alert dialog //http://www.codebind.com/android-tutorials-and-examples/android-studio-android-alert-dialog-example/
AlertDialog.Builder a_builder = new AlertDialog.Builder(MainActivity.this);
a_builder.setMessage("Do you want to Close this App !!!")
.setCancelable(false)
.setPositiveButton("Yes",new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
finish();
}
})
.setNegativeButton("No",new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
}) ;
AlertDialog alert = a_builder.create();
alert.setTitle("Alert !!!");
alert.show();
#Custom Dialog //http://abhiandroid.com/ui/custom-alert-dialog-example-android-studio.html
- Buat file xml layoutnya R.layout.custom
- Bikin kode di activity
final Dialog dialog = new Dialog(context);
dialog.setContentView(R.layout.custom);
Button dialogButton = (Button) dialog.findViewById(R.id.dialogButtonOK);
// if button is clicked, close the custom dialog
dialogButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
dialog.dismiss();
Toast.makeText(getApplicationContext(),"Dismissed..!!",Toast.LENGTH_SHORT).show();
}
});
dialog.show();
25. Mengecek value json object ada atau tidak
//https://stackoverflow.com/a/17489072
rootObj.has("1") or use rootObj.optJSONObject("1");
26. Datepicker Android, Fragment
https://neurobin.org/docs/android/android-date-picker-example/
/** Fragment */
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.widget.DatePicker;
import android.widget.TextView;
import java.util.Calendar;
public class DatePickerFragment extends DialogFragment
implements DatePickerDialog.OnDateSetListener {
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current date as the default date in the picker
final Calendar c = Calendar.getInstance();
int year = c.get(Calendar.YEAR);
int month = c.get(Calendar.MONTH);
int day = c.get(Calendar.DAY_OF_MONTH);
// Create a new instance of DatePickerDialog and return it
return new DatePickerDialog(getActivity(), this, year, month, day);
}
public void onDateSet(DatePicker view, int year, int month, int day) {
// Do something with the date chosen by the user
TextView tv1= (TextView) getActivity().findViewById(R.id.textview1);
tv1.setText("Year: "+view.getYear()+" Month: "+view.getMonth()+" Day: "+view.getDayOfMonth());
}
}
/** Activity **/
public void showDatePickerDialog(View v) {
DialogFragment newFragment = new DatePickerFragment();
newFragment.show(getSupportFragmentManager(), "datePicker");
}
/** Another example **/
date = (EditText) findViewById(R.id.date);
// perform click event on edit text
date.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// calender class's instance and get current date , month and year from calender
final Calendar c = Calendar.getInstance();
int mYear = c.get(Calendar.YEAR); // current year
int mMonth = c.get(Calendar.MONTH); // current month
int mDay = c.get(Calendar.DAY_OF_MONTH); // current day
// date picker dialog
datePickerDialog = new DatePickerDialog(MainActivity.this,
new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year,
int monthOfYear, int dayOfMonth) {
// set day of month , month and year value in the edit text
date.setText(dayOfMonth + "/"
+ (monthOfYear + 1) + "/" + year);
}
}, mYear, mMonth, mDay);
datePickerDialog.show();
}
});
27. Mengubah String menjadi format tanggal tertentu, kasus 2017-7-2 yyyy-M-d
// https://www.mkyong.com/java/java-date-and-calendar-examples/
// https://stackoverflow.com/a/5301325
// http://irnanto.com/java/menampilkan-nama-hari-tanggal-bulan-dan-tahun-di-java.html
Calendar cal = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-M-d", Locale.ENGLISH);
try {
Date date = sdf.parse(data.getTanggalExpired());
cal.setTime(date);
SimpleDateFormat formatTanggal = new SimpleDateFormat("EEEE, d MMMM yyyy");
String tanggalExpired = formatTanggal.format(cal.getTime());
holder.tanggal.setText(tanggalExpired);
} catch (ParseException e) {
e.printStackTrace();
}
28. Membandingkan tanggal di database dengan hari ini di PHP Server
// http://www.highlystructured.com/comparing_dates_php.html
$exp_date = $data["tanggal_kadaluarsa"];
//$exp_date = "2017-01-16";
$todays_date = date("Y-m-d");
$today = strtotime($todays_date);
$expiration_date = strtotime($exp_date);
if ($expiration_date > $today) {
$sites["aktif"] = "aktif" ;
} else {
$sites["aktif"] ="nonaktif" ;
}
29. Tanggal DatePicker agar muncul 2 digit
// https://stackoverflow.com/a/10203963
DecimalFormat mFormat= new DecimalFormat("00");
mFormat.setRoundingMode(RoundingMode.DOWN);
mFormat.format(Double.valueOf(year));
String Dates = mFormat.format(Double.valueOf(year)) + "-" +
mFormat.format(Double.valueOf(month+1)) + "-" + mFormat.format(Double.valueOf(day));
editTanggal.setText(Dates);
29. Solusi upload beberapa file pakai Android FastNetworking Library
HashMap<String, File> myMap = new HashMap<String, File>();
File fileMateri = null;
if (editMateri.length()>0) {
fileMateri = new File(filePathMateri.getPath());
myMap.put("Materi",fileMateri);
}
File fileTugas = null;
if(editTugas.length()>0) {
fileTugas = new File(filePathTugas.getPath());
myMap.put("Tugas",fileTugas);
}
AndroidNetworking.upload(URL_PERTEMUAN_UPDATE)
.addMultipartFile(myMap)
.addMultipartParameter(Tag_Id,username)
.addMultipartParameter(Tag_IdPertemuan,IdPertemuan)
.addMultipartParameter("Judul_Pertemuan",judul )
.addMultipartParameter("Catatan", catatan)
.addMultipartParameter("Tanggal_Kadaluarsa", tanggalKadaluarsa)
.setTag("uploadTest")
.setPriority(Priority.HIGH)
.build()
.setUploadProgressListener(new UploadProgressListener() {
@Override
public void onProgress(long bytesUploaded, long totalBytes) {
long progress = bytesUploaded/totalBytes *100;
int progressStatus = (int) progress;
pb.setProgress(progressStatus);
}
}).getAsJSONObject(new JSONObjectRequestListener() {
@Override
public void onResponse(JSONObject response) {
Log.d(Tag_Testing, response.toString());
pb.setVisibility(View.GONE);
try {
boolean success = response.getBoolean("status");
String info = response.getString("info");
if(success) {
Notif.SnackBar(root, info);
finish();
}
} catch (JSONException e) {
Notif.SnackBar(root, e.getMessage());
}
}
@Override
public void onError(ANError error) {
Log.d(Tag_Testing, error.toString());
Notif.SnackBar(root, error.toString());
}
});
30. Mengubah nama / text di Navigation View header
//https://stackoverflow.com/a/33999635
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
View header=navigationView.getHeaderView(0);
/*View view=navigationView.inflateHeaderView(R.layout.nav_header_main);*/
name = (TextView)header.findViewById(R.id.username);
email = (TextView)header.findViewById(R.id.email);
name.setText(personName);
email.setText(personEmail);
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